﻿/*********************************************        
作者：曹旭升              
QQ：279060597
访问博客了解详细介绍及更多内容：   
http://blog.shengxunwei.com
**********************************************/
using System;
namespace Sheng.SailingEase.Controls.TextEditor
{
	public struct TextLocation : IComparable<TextLocation>, IEquatable<TextLocation>
	{
		public static readonly TextLocation Empty = new TextLocation(-1, -1);
		public TextLocation(int column, int line)
		{
			x = column;
			y = line;
		}
		int x, y;
		public int X {
			get { return x; }
			set { x = value; }
		}
		public int Y {
			get { return y; }
			set { y = value; }
		}
		public int Line {
			get { return y; }
			set { y = value; }
		}
		public int Column {
			get { return x; }
			set { x = value; }
		}
		public bool IsEmpty {
			get {
				return x <= 0 && y <= 0;
			}
		}
		public override string ToString()
		{
			return string.Format("(Line {1}, Col {0})", this.x, this.y);
		}
		public override int GetHashCode()
		{
			return unchecked (87 * x.GetHashCode() ^ y.GetHashCode());
		}
		public override bool Equals(object obj)
		{
			if (!(obj is TextLocation)) return false;
			return (TextLocation)obj == this;
		}
		public bool Equals(TextLocation other)
		{
			return this == other;
		}
		public static bool operator ==(TextLocation a, TextLocation b)
		{
			return a.x == b.x && a.y == b.y;
		}
		public static bool operator !=(TextLocation a, TextLocation b)
		{
			return a.x != b.x || a.y != b.y;
		}
		public static bool operator <(TextLocation a, TextLocation b)
		{
			if (a.y < b.y)
				return true;
			else if (a.y == b.y)
				return a.x < b.x;
			else
				return false;
		}
		public static bool operator >(TextLocation a, TextLocation b)
		{
			if (a.y > b.y)
				return true;
			else if (a.y == b.y)
				return a.x > b.x;
			else
				return false;
		}
		public static bool operator <=(TextLocation a, TextLocation b)
		{
			return !(a > b);
		}
		public static bool operator >=(TextLocation a, TextLocation b)
		{
			return !(a < b);
		}
		public int CompareTo(TextLocation other)
		{
			if (this == other)
				return 0;
			if (this < other)
				return -1;
			else
				return 1;
		}
	}
}
